/* ==========================================================
   Rajanie Prabha — Academic Portfolio
   Minimal, single-column, sans-serif (Inter)
   ========================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --max-width: 760px;
  --text: #1a1a1a;
  --text-muted: #6b6b6b;
  --bg: #ffffff;
  --bg-muted: #fafafa;
  --accent: #2c5282;
  --accent-hover: #1a365d;
  --border: #ececec;
}

body.dark-mode {
  --text: #e5e5e5;
  --text-muted: #9a9a9a;
  --bg: #0f0f0f;
  --bg-muted: #1a1a1a;
  --accent: #93c5fd;
  --accent-hover: #bfdbfe;
  --border: #2a2a2a;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 28px 80px 28px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ========== TYPOGRAPHY ========== */
name {
  display: block;
  font-size: 30px;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--text);
  margin-bottom: 10px;
}

heading {
  display: block;
  font-size: 17px;
  font-weight: 600;
  margin-top: 56px;
  margin-bottom: 20px;
  color: var(--text);
  letter-spacing: -0.1px;
  scroll-margin-top: 24px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

papertitle {
  display: block;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 2px;
}

strong {
  font-weight: 600;
  color: var(--text);
}

em {
  font-style: italic;
  color: var(--text-muted);
  font-size: 14px;
}

p {
  margin-bottom: 12px;
}

/* ========== LINKS ========== */
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover,
a:focus {
  color: var(--accent-hover);
  border-bottom-color: var(--accent-hover);
  outline: none;
}

/* ========== HEADER ========== */
.header {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  margin-bottom: 8px;
}

.header-text {
  flex: 1;
  min-width: 0;
}

.header-text p {
  font-size: 15.5px;
}

.header-photo {
  flex-shrink: 0;
  width: 180px;
}

.header-photo img {
  width: 100%;
  height: auto;
  border-radius: 4px;
  display: block;
}

.contact {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ========== TOP NAV (inline) ========== */
.top-nav {
  font-size: 14px;
  margin: 24px 0 12px 0;
}

.top-nav a {
  color: var(--text-muted);
  margin-right: 16px;
}

.top-nav a:hover {
  color: var(--accent);
  border-bottom-color: transparent;
}

/* ========== PUBLICATIONS ========== */
.publication {
  display: flex;
  gap: 20px;
  margin-bottom: 22px;
  align-items: flex-start;
}

.publication-figure {
  flex-shrink: 0;
  width: 140px;
  height: auto;
  border-radius: 3px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.publication-details {
  flex: 1;
  font-size: 14.5px;
  line-height: 1.5;
  min-width: 0;
}

.publication-details em {
  font-size: 13.5px;
}

.publication-details .award {
  color: #b45309;
  font-style: italic;
  font-size: 13.5px;
}

body.dark-mode .publication-details .award {
  color: #fbbf24;
}

/* ========== EXPERIENCE ========== */
.experience-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.experience-item {
  display: flex;
  gap: 20px;
  align-items: center;
  margin-bottom: 18px;
}

.experience-logo {
  flex-shrink: 0;
  width: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.experience-logo img {
  max-width: 72px;
  max-height: 52px;
  object-fit: contain;
}

.experience-info {
  flex: 1;
}

.experience-info h3 {
  font-size: 15px;
  font-weight: 600;
  margin: 0 0 2px 0;
}

.experience-info .role {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ========== SIMPLE LIST ========== */
.simple-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.simple-list li {
  margin-bottom: 8px;
  font-size: 14.5px;
  line-height: 1.55;
}

.simple-list li::before {
  content: "·  ";
  color: var(--text-muted);
}

/* ========== DARK MODE TOGGLE ========== */
#dark-mode-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 6px 10px;
  font-size: 14px;
  cursor: pointer;
  border-radius: 6px;
  color: var(--text-muted);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

#dark-mode-toggle:hover {
  background: var(--bg-muted);
  color: var(--text);
  border-color: var(--text-muted);
}

/* ========== FOOTER ========== */
.footer {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 64px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
}

.footer a {
  color: var(--text-muted);
}

.footer a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ========== PERSONAL PAGE GALLERY ========== */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-top: 24px;
}

.gallery figure {
  margin: 0;
}

.gallery img {
  width: 100%;
  height: auto;
  border-radius: 3px;
  display: block;
  border: 1px solid var(--border);
}

.gallery figcaption {
  font-size: 13px;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 8px;
  text-align: center;
}

/* ========== RESPONSIVE ========== */
@media (max-width: 640px) {
  body {
    padding: 44px 20px 60px 20px;
    font-size: 15.5px;
  }

  .header {
    flex-direction: column-reverse;
    gap: 20px;
    align-items: flex-start;
  }

  .header-photo {
    width: 140px;
  }

  name {
    font-size: 26px;
  }

  heading {
    font-size: 16px;
    margin-top: 44px;
  }

  .publication {
    flex-direction: column;
    gap: 12px;
  }

  .publication-figure {
    width: 100%;
    max-width: 240px;
  }

  .gallery {
    grid-template-columns: 1fr;
  }

  .top-nav a {
    margin-right: 12px;
    display: inline-block;
    margin-bottom: 4px;
  }
}